Year	Number
2004-01-01	5021.0000
2005-01-01	8230.0000
2006-01-01	11395
2007-01-01	13413
2008-01-01	15022.5600
2009-01-01	16825.2672
2010-01-01	18339.5412
2011-01-01	19806.7045
2012-01-01	20797.0398
2013-01-01	21628.9214
2014-01-01	22926.6566
2015-01-01	24072.9895
2016-01-01	13727.0000
2017-01-01	509.0000